I wish we did have responsibility for the hair. I have been screwed up by the hair on many occasions.
But all that having been said, you can't, in a city of a million people like Karbala, or 5 million like Baghdad, you can't be in all places at all times.
Vertigo, it was thought at the time, could only be caused by a disease of the cerebellum. He observed this kind of patient for years and saw absolutely no symptoms of brain disease.